Endocrine CBL: Oxytocin

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Last updated 12:38 PM on 1/9/26
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6 Terms

1
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Where is oxytocin synthesised?

supraoptic and paraventricular nuclei of the hypothalamus

2
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Where is oxytocin stored and released?

posterior pituitary gland

3
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What are the main effects of oxytocin?

  • stimulates myoepithelial contractions in the uterus during childbirth

  • stimulates milk ejection from lactating mammary gland (suckling is a major stimulus for release)


4
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What triggers oxytocin release?

  • childbirth

  • breast feeding

  • physical touch

  • exercise

  • listening to music

  • orgasm/sexual arousal


5
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What type of feedback loop does oxytocin have?

  • positive feedback loop

  • For childbirth and breastfeeding, oxytocin release creates a positive feedback loop: the hormone causes an action (contraction/milk let-down), which stimulates more oxytocin release, intensifying the effect until the trigger stops.


6
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What can suppress oxytocin release?

  • relaxin; This hormone acts in the brain to inhibit oxytocin release, helping to prevent premature uterine contractions, especially around childbirth.